Method for realizing self-oscillating multi-carrier fiber optic light source and multi-carrier fiber optic light source system

Abstract

A method for realizing a self-oscillating multi-carrier optical fiber light source and a multi-carrier optical fiber light source system: establish a multi-carrier optical fiber light source based on a cyclic frequency shift loop; amplify the optical signal output by the multi-carrier optical fiber light source in the optical domain; Perform longitudinal mode selection processing in the signal optical domain; convert the optical signal after longitudinal mode selection processing into corresponding electrical signals of different frequencies; perform electrical domain filtering on the electrical signal; perform electrical domain amplification on the filtered electrical signal; The final electrical signal is fed back to the frequency shifter in the cyclic frequency shifting loop of the multi-carrier fiber optic light source, which is used to drive the frequency shifter to control the frequency shift of the optical signal, so that the multi-carrier fiber optic light source outputs an optical signal with a set frequency interval. Part of the above optical signals returns to step 2 for the next cycle, and the other part of the optical signals is used as the multi-carrier output of the entire system. The invention has the characteristics of large output signal carrier coverage, flat power, low phase noise, and no external radio frequency driving source.

Description

technical field [0001] The invention relates to an optical fiber light source. In particular, it relates to a method for realizing a self-oscillating multi-carrier fiber optic light source and a multi-carrier fiber optic light source system. Background technique [0002] Multi-carrier fiber optic light source, that is, a fiber optic light source that can simultaneously output multiple carriers of different frequencies. In recent years, multi-carrier fiber optic light sources have played an important role in communication systems such as Dense Wavelength Division Multiplexing (DWDM) and Orthogonal Frequency Division Multiplexing (OFDM), optical fiber sensing, optical component testing, spectroscopy, and phased array radar. It has been widely valued and studied by researchers at home and abroad. Multi-carrier fiber optic light sources can be divided into two categories: intracavity modulation and extracavity modulation according to their generation mechanism. [0003] (1) I...

AI Technical Summary

Problems solved by technology

However, the analysis of its system structure shows that the multi-carrier generation mechanism in the multi-carrier fiber optic light source based on the optoelectronic oscillator is still a single modulation with a certain modulation depth using modulators or cascaded modulators, which greatly limits its output. Optimization of spectral flatness and further expansion of carrier coverage

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